underdown



(No Model.)

J. ZIMMERMAN sv J. K. UNDERDOWN. MACHINE POR FOBMING PIAOLYGONAL GAN BODIES.

Patented Deo. 26, 1893.

lllll UNITED STATES l PATENT OEEICE.

JOHN ZIMMERMAN AND JOHN K. UNDERDOWN, OF CHICAGO, ILLINOIS, ASSIGNORS TO TI-IE NATIONAL KEY-OPENING CAN COMPANY, OF

SAME PLACE.

MACHINE FOB FQRMI'NG PoLYGoNAL CAN-BODIES.

SPECIFICATION forming part of Letters Patent No. 511,486, dated December 26, 1893.

Application filed December 16,1892. Serial No. 455,355. (No model.)

To all whom yt may concern.-

Be it known that we, JOHN ZI-MMERMAN and JOHN K. UNDERDOWN, of chicago, inl the having detachable circumferential strips with integral free tongues formed by a slit or slits out inwardly from one of the lapping edges of the body blank. In this construction the unslitted edge of the blank is torest upon the oppositev edge but beneath the ltongue formed in the latter. It is therefore necessary to provide in a machine for forming-polygonal cans of this class, means for bending back the tongue so that it may not be covered by the opposite edge of the can body-in making the lap preparatory to soldering.v As is well known, square or polygonal sheet metal can bodies are formed about a polygonal mandrol or former by movable jaws which rise at opposite sides of the formerand extend over its top, the jaw which carries the underlapping edge of the blank being constructed or moved in such manner as to bring that edge first down upon the top of the mandrel in position to lie beneath theopposite edge of the `blank when, immediately afterward, it r*is brought downwardlytoward the mandrel.

In the `accompanying drawings which illustrate our invention, Figure 1 is a plan view of the essential parts of the ordinary machine for forming polygonal and pyramidal`can bodies having our improvement applied thereto. Fig. 2 is a transverse section of' those portions shown in Fig. 1,'in the line 2-2 of Fig. l.

Fig. 3 illustrates the margin of a can bodyr blank having the tongue formed therein by It will be a sufficient description ofthe inac chine exclusive of our improvement to say that A represents the usual polygonal mandrel, B B thehingedy forming jaws and C the table or bed of the machine. Each :of the forming jaws has, on its upper or inner face and at its outermargin, a lateral projection B2 which presses the adjacent margin of the blank over the top of the mandrel A and into horizontal position thereon.

, D (Figs. 2 and 3) represents. the blank having the lateral, detached tongue d. This blank4 is inserted in the machine in the usual Inan- `ner with its middle portion beneath the former A and over the arm, A', and the jawsylB B', upon being raised (as indicated indotted lines of Fig.2) bend the blank about the former and-bring its upper edges into lapped relation upon the upper surface of the latter.

. In order to provide for the bending of the tongue d backwardly, asproposed by our inventionfor the purposestated and as indicated in dotted lines of said Fig. 2, the outer edge of the jaw B is notched at b at a point latter is in position to be formed. To bend -beneaththetongue d of the blank when the the tongue a` bender, as E, is provided, being u arranged in the path of the said notch'b and` above the tongue of the blank D when the latter is inA place to be formed.. In' this case said benderE is, in lform,` the laterally deflected en d of astandard E which is both vertically'y and laterallysecured to the-bed C; but,while this is a desirable construction, the bender may be otherwisey held in place, eitheradjustably or iixedly. y The lateral adjustment `referred to is indicated in Fig. 1 by the slot o in the bed throughwhich 4the standard E passes and in any portion of which vit maybe vsecured by the nuts ce, these nuts serving obvious manner shown.Y v j .By means of the bender itis manifest that when the jaw B rises beneath the slittedl or tongue-bearing margin of the blank Dv and raises the latter against the bender, said bender will strike the top'of the tongue d and, in i i also to eectthe vertical adjustment jin` the v the further upward movement of the blank, will defiect the latter downwardlyin the notch b of the jaw B, giving it substantially the, position and direction indicated in the dotted lines which represent the blank and tongue elevated entirely above said bender in Fig. 2. The tongue being thus retracted, the adjacent edge of the blank may be brought to the top of the former in the usual manner in advance of the opposite ed ge of the blank, so that when the latter descends upon it the tongue will not be covered.

Before applying the solder, and preferably before bringing the usual holding clamp down upon the overlapping edge of the blank, the tongue should be bent down upon the latter, and this may be conveniently done by the operator who Will usually strike the tongue with his soldering iron on its,way to the end of the seam at which he starts in applying the solder.

While usually the jaw B will have its lateral projection B2 of such thickness as to require the notch b, as shown, in some cases it may be of such less thickness as to escape the end of the bender E Without being notched for this purpose.

Te claim as our inventioni l. In a machine for forming a can body from a metal sheet having a tongue at one of its `lapping margins, the combination, with a forming horn and a pair of folding jaws which wrap the sheet about the horn, cfa stationary part arranged in the path of the tongne upon the sheet and serving to bend said tongue backwardly in the advancing movement ot' the margin of the sheet to which said tongue belongs.

2. In a machine for forming a canbody from a metal sheet having a tongue at one of its 4o lapping margins, the combination, with a forming horn and a pair of folding jaws which Wrap the sheet about the horn, of an adjustable, stationary tongue bender arranged in the path of the horn, substantially as and for the purpose set forth.

3. In a machine for forming acan body from a metal sheet having a tongue at one of its lapping margins, the combination, with a horizontal forming horn and a pair of folding 5o jaws which` wrap the sheet upwardlyfabont the horn, of atongue bender arranged in the path of the tongue and adapted to be both iaterally and vertically ad jnsted, substantially as described.

In testimony that We claim the foregoing as our' invention we aflix our signatures in presence of two witnesses.

JOHN ZIMMERMAN. JOHN K. UNDERDOVVN.

lVitnesses:

C. CLARENCE POOLE, M. E. DAYTON. 

